Science Topics term usage 2009-02-20

This analysis excludes the activity of search-engine spiders, USGS users, and transactions resulting in errors.

(Table shows only the 40 most frequently chosen terms.)

507	earthquakes
313	volcanoes
209	earthquake occurrences
124	maps and atlases
75	real-time monitoring and reporting
69	USGS map servers
64	climate change
57	mineral resources
47	energy resources
43	topographic maps
42	geospatial analysis
39	avian influenza
36	invasive species
35	droughts
34	floods
32	remote sensing
29	water quality
25	surface water (non-marine)
25	contamination and pollution
25	ground water
21	geologic maps
17	fires
15	seismology
15	environmental health (human)
13	animals
13	drainage basins
12	earthquake probabilities
12	acid deposition
11	human impacts
11	tectonic processes
10	biodiversity
10	health and disease
9	global warming
9	social sciences
9	erosion
9	endangered species
9	oil resources
9	aerial photography
9	stream-gage measurement
8	freshwater ecosystems

Science Topics term usage Friday, 2009-02-20